What is Docker & How It REALLY Works (Client, Daemon, containerd, runc Explained Simply)

What is Docker — and how does it actually work under the hood? In this lesson from the 100 Docker Images: Zero to Architect series, we go deeper than any "memorize the commands" tutorial, but explain every piece in the simplest words possible: Why Docker exists ("it works on my machine!") What Docker really is — package + run, the shipping-container idea Container vs Virtual Machine — the #1 misconception The 5 pieces: client, daemon (dockerd), images, containers, registry The engine room: dockerd → containerd → shim → runc Namespaces & cgroups — what makes a process a "container" Image, container, registry explained The full journey of a single `docker run` command By the end you'll understand Docker better than most engineers already working in the field. 🐳 This is the foundation for the whole series — next, we start building 100 real Docker images, one per video, from zero to architect level. 💻 Notes + code: https://github.com/devopsaikingdom 🌐 Portfolio: https://devopsaikingdom.github.io 🔔 Subscribe and follow from the start. #DAC #Docker #DevOps #DevSecOps #Containers #DockerArchitecture #containerd #runc #Kubernetes #DockerTutorial